CN104360465B - A kind of zoom telecentric lens - Google Patents
A kind of zoom telecentric lens Download PDFInfo
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- CN104360465B CN104360465B CN201410556145.XA CN201410556145A CN104360465B CN 104360465 B CN104360465 B CN 104360465B CN 201410556145 A CN201410556145 A CN 201410556145A CN 104360465 B CN104360465 B CN 104360465B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/22—Telecentric objectives or lens systems
Abstract
A kind of zoom telecentric lens, are related to optical technology.Play image planes from object plane includes successively：The first lens group with positive refracting power focal power, the second lens group with positive refracting power focal power, the 3rd lens group with negative index focal power, the 4th lens group with positive refracting power focal power and the 5th lens group with positive refracting power focal power；Wherein, first lens group, the 3rd lens group and the 5th lens group are fixed group, and the second lens group and the 4th lens group are mobile group, when zoom telecentric lens are from low power to high power zoom, second lens group is close to the first lens group, and the 4th lens group is close to the 3rd lens group.During zoom, stop position also changes in independently adjustment.With high zoom ratio, object space resolution ratio is up to 4.7 μm；Conjugate distance keeps constant during zoom, and each zoom position is using the design of object space telecentricity, it is ensured that the repeatability of measurement data when the accuracy of measurement data and different depth of field positions；TV distortion is less than 0.05%.
Description
Technical field
The present invention relates to optical technology, espespecially a kind of zoom telecentric lens, its conjugate distance immobilizes, object space telecentricity, fits
For accurate radiographic measurement.
Background technology
The sophisticated manufacturing such as electronics field widely uses optical imaging lens detection product quality.With sophisticated manufacturing
Quality requirements more and more higher, Precision measurement industry is presented below as trend：1st, Product checking turns to full inspection from sampling observation；2nd, offline inspection
Turn to on-line checking；3rd, accuracy of detection turns to micron order by 0.01mm ranks；4th, semi-automatic measuring turns to a key automatic measurement.This
Require that used detection device there must be the convenience of high efficiency, high accuracy and operation, certainly will be to detection device
Used optical imaging lens requirement becomes high.
In the prior art, the camera lens measured for product mainly has following three class：
First, fixed times of telecentric lens, it is possible to achieve can also be guaranteed in big visual field detection, accuracy of detection.But
When different size object is measured using same measuring system, it will go wrong, such as one ratio of measurement
Less object, user is desirable for detecting than larger multiple（The less detection range of big multiple correspondence, while precision meeting
Preferably ensured）Otherwise, need to use small multiple to detect again when measuring than larger object（Small multiple correspondence is larger
Detection range, the larger multiple difference of precision, but can ensure）.But because measuring system can not convert multiple in itself,
So bringing very big inconvenience to user.
Second, continuous zoom lens, the detection visual field of camera lens is smaller, and because its optical system is not really remote
Feel concerned about system, can cause testee in camera lens field depth diverse location measurement when, there is deviation from each other in measured value；
In same position measurement, measured value and standard value can also have deviation simultaneously so that accuracy of detection is by very big shadow
Ring, it is impossible to reach micron order；
Third, the telecentric lens of several multiple combinations, can be with zoom to fixed several multiples, but can not realize continuous
Zoom, solves two above type camera lens problem encountered to some extent, but multiple is very limited, does not surpass typically
4 fixed multiples are crossed, great limitation and inconvenience are still being faced using upper.
The content of the invention
The technical problem to be solved in the invention is to overcome the existing fixed times telecentric lens can not to convert multiple, continuous zoom
The Shot Detection visual field is smaller and telecentric lens multiple of several multiple combinations changes very limited amount of deficiency, releases a kind of become
Times telecentric lens.The camera lens：1st, conjugate distance immobilizes, operating distance does not change because of the change of multiple；2nd, object space telecentricity is set
Meter, the problem of fundamentally solving measured deviation occur in field depth；3rd, continuous zoom is realized, user when in use can be with
Most suitable multiple is chosen at random between minimum and maximum multiple, while meeting the most suitable detection visual field.
Therefore, a kind of zoom telecentric lens of the invention use following technical proposals：
A kind of zoom telecentric lens, play image planes from object plane includes successively：The first lens with positive refracting power focal power
Group, the second lens group with positive refracting power focal power, the 3rd lens group with negative index focal power, with positive refracting power
4th lens group of focal power and the 5th lens group with positive refracting power focal power；Wherein, the first lens group, the 3rd lens
Group and the 5th lens group is are fixedly installed, and the second lens group and the 4th lens group are mobile group, when zoom telecentric lens are from low power
During to high power zoom, the second lens group is close to the first lens group, and the 4th lens group is close to the 3rd lens group；When the zoom
When telecentric lens are from high power to low power zoom, the second lens group is close to the 3rd lens group, and the 4th lens group is to the 5th lens group
It is close.
Above-mentioned technical proposal is further elaborated：
A kind of above-mentioned zoom telecentric lens, also are compliant with following any one conditional, or following any two conditional, or together
The conditionals of below Shi Fuhe three：
Formula one, 0.2<D0/F1<0.5
Formula two, 1<D22/F22<5
Formula three, 1<|L4|/|L2|<4
Wherein D0 is distance of the object plane to the first lens apex of the first lens group, and F1 is the focal length of the first lens group, | L2
|, | L4 | it is respectively the absolute value of the maximum amount of movement of the second lens group, the 4th lens group from low power to high power, D22 is second saturating
First lens of microscope group are close to the side of object plane in the distance of each zoom position to image planes, and F22 is the second lens group to the 5th saturating
Combined focal length of the microscope group in each zoom position.
First lens group includes the first lens, the second lens, the 3rd lens and the being arranged in order from object plane to image planes
Four lens, the first lens are a biconvex lens, and the second lens are the meniscus convex surface facing object plane, and the 3rd lens are lenticular
Mirror, the 4th lens are biconcave lens, the 3rd lens close to the surface of image planes side radius of curvature and the 4th lens close to object plane
The radius of curvature on the surface of side is identical, the 3rd lens and the 4th lens composition balsaming lens glued together.
Second lens group includes the 5th lens, the 6th lens and the 7th lens being arranged in order from object plane to image planes, the
Five lens are the meniscus convex surface facing object plane, and the 6th lens are biconvex lens, and the 7th lens are biconvex lens, the 5th lens
Radius of curvature of the radius of curvature on the surface of close image planes side with the 6th lens close to the surface of object plane side is identical, and the 5th is saturating
Mirror and the 6th lens composition balsaming lens glued together.
3rd lens group includes the 8th lens, the 9th lens and the tenth lens being arranged in order from object plane to image planes, the
Eight lens are biconcave lens, and the 9th lens are a biconcave lens, and the tenth lens are the meniscus convex surface facing object plane, and the 9th is saturating
Radius of curvature radius of curvature with tenth lens close to the surface of object plane side of the mirror close to the surface of image planes side is identical, and the 9th
Lens and the tenth lens composition balsaming lens glued together.
4th lens group is saturating including the 11st lens being arranged in order from object plane to image planes, the 12nd lens and the 13rd
Mirror, the 11st lens are a biconvex lens, and the 12nd lens are the meniscus convex surface facing object plane, and the 13rd lens are convex surface
Towards the meniscus of object plane, the 12nd lens close to the surface of image planes side radius of curvature with the 13rd lens close to object plane
The radius of curvature on the surface of side is identical, the 12nd lens and the 13rd lens composition balsaming lens glued together.
5th lens group is saturating including the 14th lens being arranged in order from object plane to image planes, the 15th lens and the 16th
Mirror, the 14th lens are the concave-convex lens convex surface facing image planes, and the 15th lens are the meniscus convex surface facing object plane, the tenth
Six lens are biconvex lens.
The diaphragm of the zoom telecentric lens is located between the 3rd lens group and the 4th lens group, during zoom, diaphragm
Position also changes in independently adjustment.
The working mechanism of the present invention is that functionally, the second lens group and the 4th lens group are zoom group, and the 5th is saturating
Microscope group is that zoom is compensated and rear burnt adjustment group.Because the first lens group, the 3rd lens group and the 5th lens group are fixedly installed, the
Two lens groups and the 4th lens group are mobile group, and when the second lens group is close to the first lens group, the 4th lens group is saturating to the 3rd
Microscope group is close, just can realize zoom of the zoom telecentric lens from low power to high power；When the second lens group is close to the 3rd lens group,
4th lens group is close to the 5th lens group, just can realize the zoom from high power to low power.In order to reduce each zoom position system
Telecentricity and distortion, system is by each zoom position of diaphragm to be variable.
In whole zooming procedure, the distance of object plane to image planes is constant all the time, surface of first lens close to object plane side
Distance to object plane is constant, and the 16th lens are constant close to the distance of surface to the image planes of image planes side.
Compared with prior art, it is an advantage of the invention that：
First, with high zoom ratio, zoom is from 0.2X to 2X；
Second, conjugate distance keeps constant during zoom, object distance or image distance need not be adjusted in different multiplying position with regard to energy
Continuous blur-free imaging；
Third, each zoom position is using the design of object space telecentricity, it is ensured that the accuracy of measurement data and
The repeatability of measurement data during different depth of field positions；
Fourth, the extra small TV distortion less than 0.05%, the shape of true reduction testee；
Fifth, picture is imaged uniform-illumination；
Sixth, the up to 12mm measurement depth of field, the need for meeting user's measurement different height object or Special-shaped object；
Seventh, the big target surface designs of 1inch；
Eighth, ultrahigh resolution is designed, object space resolution ratio is up to 4.7 μm.
Brief description of the drawings
Fig. 1 is lens combination schematic cross-section of the present invention；
The motion track figure of each lens when Fig. 2 is lens combination of the present invention and changed from low power to high power；
Image optics of the Fig. 3 for the present invention at low power end simulates spherical aberration datagram；
The bent datagram of image optics simulation yards of the Fig. 4 for the present invention at low power end；
Image optics of the Fig. 5 for the present invention at low power end simulates distortion data figure；
Image optics of the Fig. 6 for the present invention at high power end simulates spherical aberration datagram；
The bent datagram of image optics simulation yards of the Fig. 7 for the present invention at high power end；
Image optics of the Fig. 8 for the present invention at high power end simulates distortion data figure.
In figure：G1, the first lens group；G2, the second lens group；G3, the 3rd lens group；G4, the 4th lens group；G5,
Five lens groups；OP, object plane；S, diaphragm；IP, image planes；1st, the first lens；2nd, the second lens；3rd, the 3rd lens；4th, the 4th lens；
5th, the 5th lens；6th, the 6th lens；7th, the 7th lens；8th, the 8th lens；9th, the 9th lens；10th, the tenth lens；11st, the ten one
Lens；12nd, the 12nd lens；13rd, the 13rd lens；14th, the 14th lens；15th, the 15th lens；16th, the 16th lens.
Embodiment
The embodiment of the present invention is introduced below in conjunction with the accompanying drawings.
As shown in Figures 1 and 2, a kind of zoom telecentric lens, play image planes IP from object plane OP includes successively：With positive refraction
First lens group G1 of rate focal power, the second lens group G2 with positive refracting power focal power, with negative index focal power
3rd lens group G3, the 4th lens group G4 with positive refracting power focal power and the 5th lens with positive refracting power focal power
Group G5；Wherein, the first lens group G1, the 3rd lens group G3 and the 5th lens group G5 is be fixedly installed, the second lens group G2 and the
Four lens group G4 are mobile group, when zoom telecentric lens are from low power to high power zoom, and the second lens group G2 is to the first lens group
G1 is close, and the 4th lens group G4 is close to the 3rd lens group G3；When the zoom telecentric lens are from high power to low power zoom, the
Two lens group G2 are close to the 3rd lens group G3, and the 4th lens group G4 is close to the 5th lens group G5.
A kind of above-mentioned zoom telecentric lens, also are compliant with following any one conditional, or following any two conditional, or together
The conditionals of below Shi Fuhe three：
Formula one, 0.2<D0/F1<0.5
Formula two, 1<D22/F22<5
Formula three, 1<|L4|/|L2|<4
Wherein D0 is the distance on object plane OP to the first lens group G1 summit of the first lens 1, and F1 is the first lens group G1's
Focal length, | L2 |, | L4 | be respectively the second lens group G2, maximum amount of movements of the 4th lens group G4 from low power to high power it is absolute
Value, D22 for the second lens group G2 the first lens 5 close to object plane OP side each zoom position to image planes IP distance,
F22 is combined focal lengths of the second lens group G2 to the 5th lens group G5 in each zoom position.
First lens group G1 includes the first lens 1, the second lens the 2, the 3rd being arranged in order from object plane OP to image planes IP
The lens 4 of lens 3 and the 4th, the first lens 1 are a biconvex lens, and the second lens 2 are the meniscus convex surface facing object plane, the 3rd
Lens 3 are biconvex lens, and the 4th lens 4 are biconcave lens, radius of curvature and the of the 3rd lens 3 close to the surface of image planes side
Radius of curvature of four lens 4 close to the surface of object plane side is identical, the 3rd lens 3 and the composition glue glued together of the 4th lens 4
Close lens.
Second lens group G2 includes the 5th lens 5, the 6th lens 6 and the 7th being arranged in order from object plane OP to image planes IP
Lens 7, the 5th lens 5 are the meniscus convex surface facing object plane, and the 6th lens 6 are biconvex lens, and the 7th lens 7 are lenticular
Mirror, the 5th lens 5 close to the surface of image planes side radius of curvature and the 6th lens 6 close to the surface of object plane side curvature half
Footpath is identical, the 5th lens 5 and the composition balsaming lens glued together of the 6th lens 6.
3rd lens group G3 includes the 8th lens 8, the 9th lens 9 and the tenth being arranged in order from object plane OP to image planes IP
Lens 10, the 8th lens 8 are biconcave lens, and the 9th lens 9 are a biconcave lens, and the tenth lens 10 are convex surface facing the convex of object plane
Concavees lens, the 9th lens 9 close to the surface of image planes IP sides radius of curvature and the tenth lens 10 close to object plane OP sides table
The radius of curvature in face is identical, the 9th lens and the tenth lens composition balsaming lens glued together.
4th lens group G4 includes the 11st lens 11, the 12nd lens 12 being arranged in order from object plane OP to image planes IP
And the 13rd lens 13, the 11st lens 11 are a biconvex lens, and the 12nd lens 12 are the meniscus convex surface facing object plane,
13rd lens 13 are the meniscus convex surface facing object plane, radius of curvature of the 12nd lens 12 close to the surface of image planes side
Radius of curvature with the 13rd lens 13 close to the surface of object plane side is identical, and the 12nd lens 12 and the 13rd lens 13 are glued
Balsaming lens is constituted together.
5th lens group G5 includes the 14th lens 14, the 15th lens 15 being arranged in order from object plane 0P to image planes IP
And the 16th lens 16, the 14th lens 14 are the concave-convex lens convex surface facing image planes, and the 15th lens 15 are convex surface facing thing
The meniscus in face, the 16th lens 16 are biconvex lens.
The diaphragm S of the zoom telecentric lens is located between the 3rd lens group G3 and the 4th lens group G4, during zoom,
Diaphragm S location also changes in independently adjustment.
At work, the second lens group G2 and the 4th lens group G4 is zoom group, and the 5th lens group G5 compensates for zoom
And rear burnt adjustment group.Because the first lens group G1, the 3rd lens group G3 and the 5th lens group G5 are fixedly installed, the second lens group
G2 and the 4th lens group G4 is mobile group, when the second lens group G2 is close to the first lens group G1, and the 4th lens group G4 is to the 3rd
Lens group G3 is close, just can realize zoom of the zoom telecentric lens from low power to high power；When the second lens group G2 is to the 3rd lens
Group G3 is close, and the 4th lens group G4 is close to the 5th lens group G5, just can realize the zoom from high power to low power.It is each in order to reduce
Diaphragm S each zoom position is variable by the telecentricity of zoom position system and distortion, system.
Fig. 3, Fig. 4 and Fig. 5 are analogue data of the present invention in the spherical aberration, the curvature of field and distortion at low power end.Fig. 6, Fig. 7 and
Fig. 8 is analogue data of the present invention in the spherical aberration, the curvature of field and distortion at high power end.It can be seen that, the present invention is best in quality, especially
It is distortion very little.
Above content is only presently preferred embodiments of the present invention, for one of ordinary skill in the art, according to the present invention's
Thought, will change in specific embodiments and applications, and this specification content should not be construed as to the present invention
Limitation.
Claims (9)
1. a kind of zoom telecentric lens, it is characterised in that：Play image planes from object plane includes successively：With positive refracting power focal power
First lens group, the second lens group with positive refracting power focal power, the 3rd lens group with negative index focal power, have
4th lens group of positive refracting power focal power and the 5th lens group with positive refracting power focal power；Wherein, the first lens group,
3rd lens group and the 5th lens group is are fixedly installed, and the second lens group and the 4th lens group are mobile group, when zoom telecentric mirror
When head is from low power to high power zoom, the second lens group is close to the first lens group, and the 4th lens group is close to the 3rd lens group；When
When the zoom telecentric lens are from high power to low power zoom, the second lens group is close to the 3rd lens group, and the 4th lens group is to
Five lens groups are close；
It also is compliant with following any one conditional：
Formula one, 0.2<D0/F1<0.5
Formula two, 1<D22/F22<5
Formula three, 1<|L4|/|L2|<4
Wherein D0 is distance of the object plane to the first lens apex of the first lens group, and F1 is the focal length of the first lens group, | L2 |, |
L4 | it is respectively the absolute value of the maximum amount of movement of the second lens group, the 4th lens group from low power to high power, D22 is the second lens
First lens of group are close to the side of object plane in the distance of each zoom position to image planes, and F22 is the second lens group to the 5th lens
Combined focal length of the group in each zoom position.
2. a kind of zoom telecentric lens according to claim 1, it is characterised in that：First lens group include from object plane to
The first lens, the second lens, the 3rd lens and the 4th lens that image planes are arranged in order, the first lens are a biconvex lens, second
Lens are the meniscus convex surface facing object plane, and the 3rd lens are biconvex lens, and the 4th lens are biconcave lens, and the 3rd lens are leaned on
Radius of curvature of the radius of curvature on the surface of nearly image planes side with the 4th lens close to the surface of object plane side is identical, the 3rd lens
With the 4th lens composition balsaming lens glued together；
Or second lens group include the 5th lens, the 6th lens and the 7th lens that are arranged in order from object plane to image planes, the 5th
Lens are the meniscus convex surface facing object plane, and the 6th lens are biconvex lens, and the 7th lens are biconvex lens, and the 5th lens are leaned on
Radius of curvature of the radius of curvature on the surface of nearly image planes side with the 6th lens close to the surface of object plane side is identical, the 5th lens
With the 6th lens composition balsaming lens glued together；
Or the 3rd lens group include the 8th lens, the 9th lens and the tenth lens that are arranged in order from object plane to image planes, the 8th
Lens are biconcave lens, and the 9th lens are a biconcave lens, and the tenth lens are the meniscus convex surface facing object plane, the 9th lens
Radius of curvature of the radius of curvature on the surface of close image planes side with the tenth lens close to the surface of object plane side is identical, and the 9th is saturating
Mirror and the tenth lens composition balsaming lens glued together；
Or the 4th lens group include being arranged in order to image planes from object plane the 11st lens, the 12nd lens and the 13rd saturating
Mirror, the 11st lens are a biconvex lens, and the 12nd lens are the meniscus convex surface facing object plane, and the 13rd lens are convex surface
Towards the meniscus of object plane, the 12nd lens close to the surface of image planes side radius of curvature with the 13rd lens close to object plane
The radius of curvature on the surface of side is identical, the 12nd lens and the 13rd lens composition balsaming lens glued together；
Or the 5th lens group include being arranged in order to image planes from object plane the 14th lens, the 15th lens and the 16th saturating
Mirror, the 14th lens are the concave-convex lens convex surface facing image planes, and the 15th lens are the meniscus convex surface facing object plane, the tenth
Six lens are biconvex lens；
Or the diaphragm of the zoom telecentric lens is located between the 3rd lens group and the 4th lens group, during zoom, diaphragm position
Put and also changed in independently adjustment.
3. a kind of zoom telecentric lens according to claim 1, it is characterised in that：First lens group include from object plane to
The first lens, the second lens, the 3rd lens and the 4th lens that image planes are arranged in order, the first lens are a biconvex lens, second
Lens are the meniscus convex surface facing object plane, and the 3rd lens are biconvex lens, and the 4th lens are biconcave lens, and the 3rd lens are leaned on
Radius of curvature of the radius of curvature on the surface of nearly image planes side with the 4th lens close to the surface of object plane side is identical, the 3rd lens
With the 4th lens composition balsaming lens glued together；
Second lens group includes the 5th lens, the 6th lens and the 7th lens being arranged in order from object plane to image planes, and the 5th is saturating
Mirror is the meniscus convex surface facing object plane, and the 6th lens are biconvex lens, and the 7th lens are biconvex lens, and the 5th lens are close
Radius of curvature of the radius of curvature on the surface of image planes side with the 6th lens close to the surface of object plane side is identical, the 5th lens with
6th lens composition balsaming lens glued together；
3rd lens group includes the 8th lens, the 9th lens and the tenth lens being arranged in order from object plane to image planes, and the 8th is saturating
Mirror is biconcave lens, and the 9th lens are a biconcave lens, and the tenth lens are the meniscus convex surface facing object plane, and the 9th lens are leaned on
Radius of curvature of the radius of curvature on the surface of nearly image planes side with the tenth lens close to the surface of object plane side is identical, the 9th lens
With the tenth lens composition balsaming lens glued together；
4th lens group includes the 11st lens, the 12nd lens and the 13rd lens being arranged in order from object plane to image planes,
11st lens are a biconvex lens, and the 12nd lens are the meniscus convex surface facing object plane, and the 13rd lens are convex surface court
To the meniscus of object plane, the 12nd lens close to the surface of image planes side radius of curvature with the 13rd lens close to object plane one
The radius of curvature on the surface of side is identical, the 12nd lens and the 13rd lens composition balsaming lens glued together；
5th lens group includes the 14th lens, the 15th lens and the 16th lens being arranged in order from object plane to image planes,
14th lens are the concave-convex lens convex surface facing image planes, and the 15th lens are the meniscus convex surface facing object plane, the 16th
Lens are biconvex lens；
The diaphragm of the zoom telecentric lens is located between the 3rd lens group and the 4th lens group, during zoom, stop position
Also changed in independently adjustment.
4. a kind of zoom telecentric lens, it is characterised in that：Play image planes from object plane includes successively：With positive refracting power focal power
First lens group, the second lens group with positive refracting power focal power, the 3rd lens group with negative index focal power, have
4th lens group of positive refracting power focal power and the 5th lens group with positive refracting power focal power；Wherein, the first lens group,
3rd lens group and the 5th lens group is are fixedly installed, and the second lens group and the 4th lens group are mobile group, when zoom telecentric mirror
When head is from low power to high power zoom, the second lens group is close to the first lens group, and the 4th lens group is close to the 3rd lens group；When
When the zoom telecentric lens are from high power to low power zoom, the second lens group is close to the 3rd lens group, and the 4th lens group is to
Five lens groups are close；
It also is compliant with following any two conditional：
Formula one, 0.2<D0/F1<0.5
Formula two, 1<D22/F22<5
Formula three, 1<|L4|/|L2|<4
Wherein D0 is distance of the object plane to the first lens apex of the first lens group, and F1 is the focal length of the first lens group, | L2 |, |
L4 | it is respectively the absolute value of the maximum amount of movement of the second lens group, the 4th lens group from low power to high power, D22 is the second lens
First lens of group are close to the side of object plane in the distance of each zoom position to image planes, and F22 is the second lens group to the 5th lens
Combined focal length of the group in each zoom position.
5. a kind of zoom telecentric lens according to claim 4, it is characterised in that：First lens group include from object plane to
The first lens, the second lens, the 3rd lens and the 4th lens that image planes are arranged in order, the first lens are a biconvex lens, second
Lens are the meniscus convex surface facing object plane, and the 3rd lens are biconvex lens, and the 4th lens are biconcave lens, and the 3rd lens are leaned on
Radius of curvature of the radius of curvature on the surface of nearly image planes side with the 4th lens close to the surface of object plane side is identical, the 3rd lens
With the 4th lens composition balsaming lens glued together；
Or second lens group include the 5th lens, the 6th lens and the 7th lens that are arranged in order from object plane to image planes, the 5th
Lens are the meniscus convex surface facing object plane, and the 6th lens are biconvex lens, and the 7th lens are biconvex lens, and the 5th lens are leaned on
Radius of curvature of the radius of curvature on the surface of nearly image planes side with the 6th lens close to the surface of object plane side is identical, the 5th lens
With the 6th lens composition balsaming lens glued together；
Or the 3rd lens group include the 8th lens, the 9th lens and the tenth lens that are arranged in order from object plane to image planes, the 8th
Lens are biconcave lens, and the 9th lens are a biconcave lens, and the tenth lens are the meniscus convex surface facing object plane, the 9th lens
Radius of curvature of the radius of curvature on the surface of close image planes side with the tenth lens close to the surface of object plane side is identical, and the 9th is saturating
Mirror and the tenth lens composition balsaming lens glued together；
Or the 4th lens group include being arranged in order to image planes from object plane the 11st lens, the 12nd lens and the 13rd saturating
Mirror, the 11st lens are a biconvex lens, and the 12nd lens are the meniscus convex surface facing object plane, and the 13rd lens are convex surface
Towards the meniscus of object plane, the 12nd lens close to the surface of image planes side radius of curvature with the 13rd lens close to object plane
The radius of curvature on the surface of side is identical, the 12nd lens and the 13rd lens composition balsaming lens glued together；
Or the 5th lens group include being arranged in order to image planes from object plane the 14th lens, the 15th lens and the 16th saturating
Mirror, the 14th lens are the concave-convex lens convex surface facing image planes, and the 15th lens are the meniscus convex surface facing object plane, the tenth
Six lens are biconvex lens；
Or the diaphragm of the zoom telecentric lens is located between the 3rd lens group and the 4th lens group, during zoom, diaphragm position
Put and also changed in independently adjustment.
6. a kind of zoom telecentric lens according to claim 4, it is characterised in that：First lens group include from object plane to
The first lens, the second lens, the 3rd lens and the 4th lens that image planes are arranged in order, the first lens are a biconvex lens, second
Lens are the meniscus convex surface facing object plane, and the 3rd lens are biconvex lens, and the 4th lens are biconcave lens, and the 3rd lens are leaned on
Radius of curvature of the radius of curvature on the surface of nearly image planes side with the 4th lens close to the surface of object plane side is identical, the 3rd lens
With the 4th lens composition balsaming lens glued together；
Second lens group includes the 5th lens, the 6th lens and the 7th lens being arranged in order from object plane to image planes, and the 5th is saturating
Mirror is the meniscus convex surface facing object plane, and the 6th lens are biconvex lens, and the 7th lens are biconvex lens, and the 5th lens are close
Radius of curvature of the radius of curvature on the surface of image planes side with the 6th lens close to the surface of object plane side is identical, the 5th lens with
6th lens composition balsaming lens glued together；
3rd lens group includes the 8th lens, the 9th lens and the tenth lens being arranged in order from object plane to image planes, and the 8th is saturating
Mirror is biconcave lens, and the 9th lens are a biconcave lens, and the tenth lens are the meniscus convex surface facing object plane, and the 9th lens are leaned on
Radius of curvature of the radius of curvature on the surface of nearly image planes side with the tenth lens close to the surface of object plane side is identical, the 9th lens
With the tenth lens composition balsaming lens glued together；
4th lens group includes the 11st lens, the 12nd lens and the 13rd lens being arranged in order from object plane to image planes,
11st lens are a biconvex lens, and the 12nd lens are the meniscus convex surface facing object plane, and the 13rd lens are convex surface court
To the meniscus of object plane, the 12nd lens close to the surface of image planes side radius of curvature with the 13rd lens close to object plane one
The radius of curvature on the surface of side is identical, the 12nd lens and the 13rd lens composition balsaming lens glued together；
5th lens group includes the 14th lens, the 15th lens and the 16th lens being arranged in order from object plane to image planes,
14th lens are the concave-convex lens convex surface facing image planes, and the 15th lens are the meniscus convex surface facing object plane, the 16th
Lens are biconvex lens；
The diaphragm of the zoom telecentric lens is located between the 3rd lens group and the 4th lens group, during zoom, stop position
Also changed in independently adjustment.
7. a kind of zoom telecentric lens, it is characterised in that：Play image planes from object plane includes successively：With positive refracting power focal power
First lens group, the second lens group with positive refracting power focal power, the 3rd lens group with negative index focal power, have
4th lens group of positive refracting power focal power and the 5th lens group with positive refracting power focal power；Wherein, the first lens group,
3rd lens group and the 5th lens group is are fixedly installed, and the second lens group and the 4th lens group are mobile group, when zoom telecentric mirror
When head is from low power to high power zoom, the second lens group is close to the first lens group, and the 4th lens group is close to the 3rd lens group；When
When the zoom telecentric lens are from high power to low power zoom, the second lens group is close to the 3rd lens group, and the 4th lens group is to
Five lens groups are close；
It also is compliant with following three conditional：
Formula one, 0.2<D0/F1<0.5
Formula two, 1<D22/F22<5
Formula three, 1<|L4|/|L2|<4
Wherein D0 is distance of the object plane to the first lens apex of the first lens group, and F1 is the focal length of the first lens group, | L2 |, |
L4 | it is respectively the absolute value of the maximum amount of movement of the second lens group, the 4th lens group from low power to high power, D22 is the second lens
First lens of group are close to the side of object plane in the distance of each zoom position to image planes, and F22 is the second lens group to the 5th lens
Combined focal length of the group in each zoom position.
8. a kind of zoom telecentric lens according to claim 7, it is characterised in that：First lens group include from object plane to
The first lens, the second lens, the 3rd lens and the 4th lens that image planes are arranged in order, the first lens are a biconvex lens, second
Lens are the meniscus convex surface facing object plane, and the 3rd lens are biconvex lens, and the 4th lens are biconcave lens, and the 3rd lens are leaned on
Radius of curvature of the radius of curvature on the surface of nearly image planes side with the 4th lens close to the surface of object plane side is identical, the 3rd lens
With the 4th lens composition balsaming lens glued together；
Or second lens group include the 5th lens, the 6th lens and the 7th lens that are arranged in order from object plane to image planes, the 5th
Lens are the meniscus convex surface facing object plane, and the 6th lens are biconvex lens, and the 7th lens are biconvex lens, and the 5th lens are leaned on
Radius of curvature of the radius of curvature on the surface of nearly image planes side with the 6th lens close to the surface of object plane side is identical, the 5th lens
With the 6th lens composition balsaming lens glued together；
Or the 3rd lens group include the 8th lens, the 9th lens and the tenth lens that are arranged in order from object plane to image planes, the 8th
Lens are biconcave lens, and the 9th lens are a biconcave lens, and the tenth lens are the meniscus convex surface facing object plane, the 9th lens
Radius of curvature of the radius of curvature on the surface of close image planes side with the tenth lens close to the surface of object plane side is identical, and the 9th is saturating
Mirror and the tenth lens composition balsaming lens glued together；
Or the 4th lens group include being arranged in order to image planes from object plane the 11st lens, the 12nd lens and the 13rd saturating
Mirror, the 11st lens are a biconvex lens, and the 12nd lens are the meniscus convex surface facing object plane, and the 13rd lens are convex surface
Towards the meniscus of object plane, the 12nd lens close to the surface of image planes side radius of curvature with the 13rd lens close to object plane
The radius of curvature on the surface of side is identical, the 12nd lens and the 13rd lens composition balsaming lens glued together；
Or the 5th lens group include being arranged in order to image planes from object plane the 14th lens, the 15th lens and the 16th saturating
Mirror, the 14th lens are the concave-convex lens convex surface facing image planes, and the 15th lens are the meniscus convex surface facing object plane, the tenth
Six lens are biconvex lens；
Or the diaphragm of the zoom telecentric lens is located between the 3rd lens group and the 4th lens group, during zoom, diaphragm position
Put and also changed in independently adjustment.
9. a kind of zoom telecentric lens according to claim 7, it is characterised in that：First lens group include from object plane to
The first lens, the second lens, the 3rd lens and the 4th lens that image planes are arranged in order, the first lens are a biconvex lens, second
Lens are the meniscus convex surface facing object plane, and the 3rd lens are biconvex lens, and the 4th lens are biconcave lens, and the 3rd lens are leaned on
Radius of curvature of the radius of curvature on the surface of nearly image planes side with the 4th lens close to the surface of object plane side is identical, the 3rd lens
With the 4th lens composition balsaming lens glued together；
Second lens group includes the 5th lens, the 6th lens and the 7th lens being arranged in order from object plane to image planes, and the 5th is saturating
Mirror is the meniscus convex surface facing object plane, and the 6th lens are biconvex lens, and the 7th lens are biconvex lens, and the 5th lens are close
Radius of curvature of the radius of curvature on the surface of image planes side with the 6th lens close to the surface of object plane side is identical, the 5th lens with
6th lens composition balsaming lens glued together；
3rd lens group includes the 8th lens, the 9th lens and the tenth lens being arranged in order from object plane to image planes, and the 8th is saturating
Mirror is biconcave lens, and the 9th lens are a biconcave lens, and the tenth lens are the meniscus convex surface facing object plane, and the 9th lens are leaned on
Radius of curvature of the radius of curvature on the surface of nearly image planes side with the tenth lens close to the surface of object plane side is identical, the 9th lens
With the tenth lens composition balsaming lens glued together；
4th lens group includes the 11st lens, the 12nd lens and the 13rd lens being arranged in order from object plane to image planes,
11st lens are a biconvex lens, and the 12nd lens are the meniscus convex surface facing object plane, and the 13rd lens are convex surface court
To the meniscus of object plane, the 12nd lens close to the surface of image planes side radius of curvature with the 13rd lens close to object plane one
The radius of curvature on the surface of side is identical, the 12nd lens and the 13rd lens composition balsaming lens glued together；
5th lens group includes the 14th lens, the 15th lens and the 16th lens being arranged in order from object plane to image planes,
14th lens are the concave-convex lens convex surface facing image planes, and the 15th lens are the meniscus convex surface facing object plane, the 16th
Lens are biconvex lens；
The diaphragm of the zoom telecentric lens is located between the 3rd lens group and the 4th lens group, during zoom, stop position
Also changed in independently adjustment.
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| US10670844B2 (en) | 2017-01-26 | 2020-06-02 | Navitar, Inc. | High etendue modular lens assembly with afocal zoom having five lens groups |
| CN107329352B (en) * | 2017-08-09 | 2022-11-11 | 深圳市安华光电技术有限公司 | Projection lens and projection system |
| CN109164559B (en) * | 2018-10-11 | 2023-11-28 | 佛山科学技术学院 | Large-numerical aperture near-infrared object image bilateral telecentric optical system |
| CN109633875B (en) * | 2019-01-14 | 2023-10-27 | 广东奥普特科技股份有限公司 | Telecentric lens capable of continuously changing magnification |
| CN109975962B (en) * | 2019-04-16 | 2023-11-28 | 佛山科学技术学院 | Bilateral telecentric optical system with long working distance |
| CN110196487B (en) * | 2019-06-17 | 2021-01-12 | 上海帆声图像科技有限公司 | Telecentric lens |
| CN110849266B (en) * | 2019-11-28 | 2021-05-25 | 江西瑞普德测量设备有限公司 | Telecentric lens telecentricity debugging method of image measuring instrument |
| CN110989137B (en) * | 2019-12-20 | 2022-03-11 | 东莞市普密斯精密仪器有限公司 | Double-telecentric lens |
| CN115657283B (en) * | 2022-12-12 | 2023-08-11 | 图湃(北京)医疗科技有限公司 | Continuous zoom system of operation microscope and operation microscope |
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| JP3600898B2 (en) * | 1995-12-27 | 2004-12-15 | 株式会社ニコン | Magnifying telecentric optics |
| JP2004317967A (en) * | 2003-04-18 | 2004-11-11 | Matsushita Electric Ind Co Ltd | Zoom lens and electronic imaging apparatus |
| JP5799227B2 (en) * | 2010-07-15 | 2015-10-21 | パナソニックＩｐマネジメント株式会社 | Zoom lens system, interchangeable lens device and camera system |
| JP2012208315A (en) * | 2011-03-30 | 2012-10-25 | Casio Comput Co Ltd | Zoom lens and projection type display device using the same |
| JP5605309B2 (en) * | 2011-06-06 | 2014-10-15 | コニカミノルタ株式会社 | Observation zoom optical system |
| CN204188874U (en) * | 2014-10-20 | 2015-03-04 | 东莞市普密斯精密仪器有限公司 | A kind of zoom telecentric lens |
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